Chemical vapour sensor using a SAW resonator

✍ Scribed by S.-M. Chang; E. Tamiya; I. Karube

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 517 KB
• Volume: 6
• Category: Article
• ISSN: 0956-5663
• DOI: 10.1016/0956-5663(91)85002-e

✦ Synopsis

A surface acoustic wave (SAW) device has been used as a chemical vapour sensor by coating phosphatidylethanolamine (PE) on to the device surface as an appropriate adsorptive coating. The characteristics of a PE-coated SAW resonator operating at 310 MHz. and capable of detecting chemical vapours. such as amyl acetate, citral. @-ionone. menthone and other organic gases are described. The lowest concentration (by volume) of chemical vapours required to change the resonant frequency was different for each compound and the values were O-1 ppm for /3-ionone. 0.5 pp for citral, 2 ppm for menthone. 10ppm for amyl acetate and IOOppm for alcohols. respectively. These data are in agreement with the results previously reported for olfactory cells and AT-cut crystal resonator devices. This study demonstrated that the SAW resonator device, coated with lipid, can be applied as a chemical vapour sensor.